Titanium plate and threading method of titanium plate and wire

Abstract

This invention provides a titanium plate and a method for threading its matching wires. The titanium plate has a fixing hole and a traction hole at both ends of its surface. Between the fixing hole and the traction hole are a set of self-locking holes (first and second), a return hole, and a through hole. The two self-locking holes and the return hole are located near the end of the titanium plate where the fixing hole is located, and the line connecting the center points of the two self-locking holes and the return hole forms a triangle. The through hole set is located near the end of the titanium plate where the traction hole is located, and the number of through holes is even. The titanium plate of this invention possesses all the functions of existing titanium plates. In particular, the matching wires of this invention can self-lock at the two self-locking hole positions through a special threading method, eliminating the need for additional knotting fixation and allowing the ligament graft to have a certain degree of positional adjustment within the bone tunnel.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a method for threading a titanium plate and its matching wires. Background Technology

[0002] Common surgical methods for cruciate ligament reconstruction include looped titanium plate fixation and interfacial screw fixation. The looped titanium plate fixation method involves connecting one or both ends of the ligament graft with a looped titanium plate, which is then passed through a bone tunnel to fix the ligament graft within the tunnel.

[0003] In knee ligament reconstruction surgery, the complexity of the coil and the surgeon's ease of operation directly affect the operation time, the patient's pain duration, and the success rate. The tightness of the ligament graft and the stability of the looped titanium plate coil will affect the postoperative outcome.

[0004] Currently, commonly used titanium plates are those with fixed coils and those with adjustable coils. Fixed-coil titanium plates cannot change the coil length during surgery, requiring the surgeon to measure and calculate the coil length based on the patient's specific condition, which increases the surgical difficulty and risk. Adjustable-coil titanium plates are commonly used with dual or triple coils, but the coil winding is complex, the procedure is cumbersome, and the surgical operation time is long, making it inconvenient for the surgeon. Summary of the Invention

[0005] To address the above problems, the present invention aims to provide a method for threading titanium plates and their matching sutures for ligament reconstruction systems. This method simplifies the coil winding process, eliminates the need for additional knotting at the tail suture to achieve self-locking, allows for adjustable coils, and enables convenient single-suture operation during implantation, thereby solving the aforementioned technical problems.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A titanium plate, the main body of which can be a cuboid, cube, ellipsoid, or any other shape conducive to passing through a bone tunnel. The titanium plate has a fixing hole and a traction hole at each end of its surface. Between the fixing hole and the traction hole are a set of self-locking holes, a second self-locking hole, a return hole, and a through hole group. The first self-locking hole, the second self-locking hole, and the return hole are all located near the end of the titanium plate where the fixing hole is located, and the line connecting the center points of the first self-locking hole, the second self-locking hole, and the return hole forms a triangle. The through hole group is located near the end of the titanium plate where the traction hole is located, and the number of through holes in the through hole group is even.

[0008] Furthermore, a smooth wire-passing groove is provided between the two holes of the self-locking hole one and the self-locking hole two; in addition, a smooth wire-passing groove is provided between any two holes of the wire-passing hole group.

[0009] Furthermore, the wire-passing holes are arranged in two rows, and preferably, the holes in the two rows of wire-passing holes correspond one-to-one.

[0010] Furthermore, the number of holes in the wire-passing hole group is an even number between 2 and 10, preferably 2 or 4. When the number of holes in the wire-passing hole group is 2, the total number of holes on the titanium plate is 7; when the number of holes in the wire-passing hole group is 10, the total number of holes on the titanium plate is 15. The total number of holes on the titanium plate is affected by the size of the titanium plate and the size of the holes; therefore, more is not necessarily better.

[0011] Furthermore, all the holes on the titanium plate are through holes with chamfered edges to prevent damage to the matching wires.

[0012] Furthermore, the material of the titanium plate is selected from pure titanium, TC4 titanium alloy, PEEK, carbon fiber, nickel-titanium alloy or other composite materials.

[0013] Furthermore, the length of the titanium plate is greater than the width and thickness of the titanium plate, and preferably, the length of the main body of the titanium plate is less than 30 mm.

[0014] In this invention, the diameter of the holes of the self-locking hole one, self-locking hole two, return hole and through hole group is 0.6mm to 6mm, preferably 1.2mm; the diameter of the traction wire hole is 0.6mm to 12mm, preferably 2mm; and the diameter of the fixing hole is 0.6mm to 12mm, preferably 1.2mm.

[0015] The titanium plate of the present invention is threaded through a matching wire using a special threading method.

[0016] The matching wire is made of polymer material (polypropylene, PET, polyethylene fiber, etc.), and its tail has a knot or other similar structure to fix the tail of the matching wire to the fixing hole, while the head of the matching wire protrudes from the other end. A locking groove can also be provided on the fixing hole, and the knot or other similar structure is completely placed within the locking groove, with the thickness of the knot or similar structure being less than the depth of the locking groove.

[0017] The threading method for titanium plate wiring includes the following steps:

[0018] Tie a knot at one end of the matching wire, then thread the wire end through the wire fixing hole, and secure the knot at the end of the wire in the wire fixing hole;

[0019] The wire end passes out of the first self-locking hole and enters the second self-locking hole. The matching wire portion between the two holes forms a self-locking bridge.

[0020] The wire end passes through and out of an even number of wire holes in a single pass-through hole, and finally exits from the return hole and passes through the self-locking bridge.

[0021] Continue threading the wire end through the traction hole to complete the threading process.

[0022] The beneficial effects of this invention are:

[0023] The titanium plate of this invention has a simple structure and possesses all the functions of existing titanium plates, requiring only one matching suture, which facilitates physician operation and reduces surgical risks. In particular, the matching suture of this invention can self-lock on the self-locking bridge between self-locking holes one and two through a special suture routing method, eliminating the need for additional knotting fixation and allowing the ligament graft to have a certain degree of positional adjustment within the bone tunnel. The multiple suture holes on the titanium plate distribute stress, extending the plate's lifespan. Simultaneously, after meeting performance requirements, the diameter of the matching suture and the size of the holes on the titanium plate can be relatively reduced. The diameter of the matching suture and all through holes on the titanium plate can be reduced to 40%-100% of the original hole diameter, thereby reducing the swaying of the titanium plate and matching suture and improving postoperative outcomes. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a titanium plate with two wire holes according to Example 1;

[0025] Figure 2 This is a schematic diagram of another titanium plate with two wire holes as described in Example 1;

[0026] Figure 3 In order to be in Figure 2 A schematic diagram of the threading method for the matching wires on the titanium plate base is shown.

[0027] Figure 4 To be according to Figure 3 The threading method and the effect after threading;

[0028] Figure 5 This is a schematic diagram of the structure of a titanium plate with four wire holes in Example 2;

[0029] Figure 6 This is a schematic diagram of the threading method for the first type of matching wire based on the titanium plate in Example 2;

[0030] Figure 7 To be according to Figure 6 The image shows the effect of threading the needle using the method shown.

[0031] Figure 8 This is a schematic diagram of the threading method for the second type of matching wire based on the titanium plate in Example 2;

[0032] Figure 9 To be according to Figure 8 The image shows the effect of threading the needle using the method shown.

[0033] Figure 10 This is a schematic diagram of the structure of a titanium plate with six wire holes in Example 3;

[0034] Figure 11This is a schematic diagram of the structure of a titanium plate with eight wire holes in Example 4. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] Example 1:

[0037] like Figure 1 and Figure 2 As shown, the titanium plate in this embodiment has a rounded cuboid structure with rounded corners on all four sides. The two ends of the titanium plate are respectively provided with a wire fixing hole 1 and a traction wire hole 15. Between the wire fixing hole 1 and the traction wire hole 15, there are self-locking holes 1-2, 2-3, 4-return hole, 5-pass hole 1, and 6-pass hole 2. The self-locking holes 1-2, 2-3, and 4-return hole 4 are all close to the end of the titanium plate where the wire fixing hole 1 is located, and the line connecting the center points of the self-locking holes 1-2, 2-3, and 4-return hole 4 forms a triangle. The 5-pass hole 1 and 6-pass hole 2 are close to the end of the titanium plate where the traction wire hole 2 is located.

[0038] In this embodiment, all holes on the titanium plate are through holes with chamfered edges. A smooth groove 16 is provided between self-locking hole 1 and self-locking hole 2.

[0039] The titanium plate is made of one of the following materials: pure titanium, TC4 titanium alloy, PEEK, carbon fiber, nickel-titanium alloy, or other composite materials.

[0040] Specifically, the length of the titanium plate is greater than its width and thickness, and preferably, due to the limitations of the working environment, the length of the main body of the titanium plate is less than 30mm. Among the holes, the diameter of self-locking hole 1, self-locking hole 2, return hole 4, and through hole 1, through hole 2, and through hole 6 is 0.6mm to 6mm, preferably 1.2mm; the diameter of traction hole 15 is 0.6mm to 12mm, preferably 2mm; and the diameter of fixing hole 1 is 0.6mm to 12mm, preferably 1.2mm.

[0041] The titanium plate of the present invention is threaded through a matching wire 17 using a special threading method.

[0042] The matching wire 17 is made of a polymer material (polypropylene, PET, polyethylene fiber, etc.), and its tail has a knot or other similar structure to fix the tail of the matching wire to the wire fixing hole 1. The head of the matching wire 17 passes through the wire fixing hole 1. A locking groove can also be provided on the wire fixing hole 1, and the knot or other similar structure is completely placed in the locking groove. The thickness of the knot or similar structure is less than the depth of the locking groove.

[0043] by Figure 2 Taking titanium plates as an example, such as Figure 3 and Figure 4 As shown, the threading method for the titanium plate's matching wire includes the following steps:

[0044] S1. Tie a knot at one end of the matching wire 17, then thread the end of the wire through the wire fixing hole 1, and the knot at the end of the wire is stuck in the wire fixing hole 1.

[0045] S2. The wire end passes out of self-locking hole 1 2 and enters through self-locking hole 2 3. The matching wire part between the two holes forms self-locking bridge A.

[0046] S3. After the suture end passes through the ligament graft for the first time, it exits through suture hole 5 and enters through suture hole 6.

[0047] S4. After the suture end passes through the ligament graft for the second time, it exits through the return hole 4 and passes through the self-locking bridge A;

[0048] When the ligament graft is stretched, the matching suture 17 is tightened, compressing the self-locking bridge A of the matching suture 17 and thus achieving self-locking of the matching suture 17. When the end of the matching suture 17 is stretched, the matching suture 17 on the ligament graft side will be tightened, thereby moving the ligament graft towards the titanium plate, achieving the purpose of adjusting the position of the ligament transplant.

[0049] S5. Finally, thread the end of the matching wire 17 into the traction wire hole 15 to form a matching wire loop. Then, pull out the end of the matching wire 17 after it has passed through the traction wire hole 15 together with the matching wire loop on the traction wire hole 15 to form a traction coil. Pass the traction coil through the bone tunnel, and then pull the traction coil to pull the titanium plate out of the bone tunnel. Then, release the end of the matching wire 17 and only pull the matching wire loop to allow the end of the matching wire 17 to quickly pass through the traction wire hole 15.

[0050] Example 2:

[0051] like Figure 5 As shown, the titanium plate structure in this embodiment differs from that in Embodiment 1 in that the wire hole group has added wire hole three 7 and wire hole four 8.

[0052] There are three methods for threading the matching wire in Example 2:

[0053] The first type:

[0054] like Figure 6 , 7 As shown, first tie a knot at one end of the matching wire 17, and then thread the wire end through the titanium plate as follows: wire in through hole 1 → self-locking hole 1 out through hole 2 → self-locking hole 2 in through hole 3 → through hole 1 out through hole 5 → through hole 3 in through hole 7 → through hole 4 out through hole 8 → through hole 2 in through hole 6 → return hole 4 out through hole 4 → through self-locking bridge A → traction wire in through hole 15.

[0055] The second type:

[0056] like Figure 8 , 9 As shown, first tie a knot at one end of the matching wire 17, and then thread the wire end through the titanium plate as follows: wire in through hole 1 → self-locking hole 1 out through hole 2 → self-locking hole 2 in through hole 3 → wire through hole 4 out through hole 8 → wire through hole 3 in through hole 7 → wire through hole 1 out through hole 5 → wire through hole 2 in through hole 6 → return wire out through hole 4 → through self-locking bridge A → traction wire in through hole 15.

[0057] The third type:

[0058] First, tie a knot at one end of the matching wire 17. Then, facing the front of the titanium plate, thread the wire end as follows: wire in through hole 1 → self-locking hole 1 out through hole 2 → self-locking hole 2 in through hole 3 → through hole 1 out through hole 5 → through hole 2 in through hole 6 → through hole 4 out through hole 8 → through hole 3 in through hole 7 → return hole 4 out through hole 4 → through self-locking bridge A → traction wire in through hole 15.

[0059] Example 3:

[0060] like Figure 10 As shown, the titanium plate structure in this embodiment differs from that in embodiment 2 in that the wire hole group has added wire hole 5 9 and wire hole 6 10.

[0061] The threading method for the titanium plate in Example 3 is similar to that in Example 2, and there are multiple threading methods. The specific threading method ensures that after the matching wire passes through the self-locking hole 1 2 and the self-locking hole 2 3 to form the self-locking bridge A, it is sequentially passed through the six wire-passing holes. The main difference between the threading methods in this example lies in the order in which the wire ends pass through the wire-passing hole group.

[0062] Example 4:

[0063] like Figure 11 As shown, the difference between the looped titanium plate structure in this embodiment and that in embodiment 3 is that the wire hole group has added wire hole seven 11 and wire hole eight 12.

[0064] The threading method for the titanium plate in Example 4 is similar to that in Example 3, and there are multiple threading methods. The specific threading method ensures that after the matching wire passes through the self-locking hole 1 2 and the self-locking hole 2 3 to form the self-locking bridge A, it is sequentially passed through the eight wire-passing holes. The main difference between the threading methods in this example lies in the order in which the wire ends pass through the wire-passing hole group.

[0065] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A titanium plate, characterized in that, The titanium plate has a wire fixing hole and a traction wire hole at both ends of its surface. Between the wire fixing hole and the traction wire hole, there is a self-locking hole 1, a self-locking hole 2, a return wire hole, and a wire passage hole group. The self-locking hole 1, the self-locking hole 2, and the return wire hole are all close to the end of the titanium plate where the wire fixing hole is located, and the line connecting the center points of the self-locking hole 1, the self-locking hole 2, and the return wire hole forms a triangle. The wire passage hole group is close to the end of the titanium plate where the traction wire hole is located, and the number of the wire passage hole group is even.

2. The titanium plate as described in claim 1, characterized in that, A smooth wire groove is provided between the self-locking hole one and the self-locking hole two.

3. The titanium plate as described in claim 1, characterized in that, The through holes are arranged in two rows.

4. The titanium plate as described in claim 1, characterized in that, The number of holes in the wire-passing hole group is an even number between 2 and 10.

5. The titanium plate as described in claim 4, characterized in that, The number of holes in the wire-passing hole group is 2 or 4.

6. The titanium plate as described in claim 1, characterized in that, The titanium plate body is shaped to facilitate passage through bone tunnels, including cuboids, cubes, or ellipsoids.

7. The titanium plate as described in claim 1, characterized in that, All the holes on the titanium plate are through holes with chamfered edges.

8. The titanium plate as described in claim 1, characterized in that, The titanium plate is made of one of the following materials: pure titanium, TC4 titanium alloy, or nickel-titanium alloy.

9. The titanium plate as described in claim 1, characterized in that, The length of the titanium plate is greater than its width and thickness.

10. The titanium plate as described in claim 9, characterized in that, The length of the main body of the titanium plate is less than 30mm.

11. The titanium plate as claimed in claim 1, characterized in that, The diameter of the holes in the self-locking hole one, self-locking hole two, return hole and through hole group is 0.6mm~6mm; the diameter of the traction wire hole is 0.6mm~12mm; and the diameter of the fixing hole is 0.6mm~12mm.

12. The titanium plate as described in claim 11, characterized in that, The diameter of the holes in the self-locking hole one, self-locking hole two, return hole and through hole group is 1.2mm; the diameter of the traction wire hole is 2mm; and the diameter of the fixing hole is 1.2mm.

13. A method for threading a wire to match a titanium plate as described in any one of claims 1 to 12, characterized in that, Includes the following steps: Tie a knot at one end of the matching wire, then thread the wire end through the wire fixing hole, and secure the knot at the end of the wire in the wire fixing hole; The wire end passes out of the first self-locking hole and enters the second self-locking hole. The matching wire portion between the two holes forms a self-locking bridge. The wire end passes through and out of an even number of wire holes in a single pass-through hole, and finally exits from the return hole and passes through the self-locking bridge. Continue threading the wire end through the traction wire hole to complete the threading process.

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